com.bytezone.dm3270.commands.AIDCommand Maven / Gradle / Ivy
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This is a trimmed down version of https://github.com/dmolony/dm3270 to be used as
TN3270 client library
package com.bytezone.dm3270.commands;
import com.bytezone.dm3270.display.Cursor;
import com.bytezone.dm3270.display.Field;
import com.bytezone.dm3270.display.FieldManager;
import com.bytezone.dm3270.display.Screen;
import com.bytezone.dm3270.orders.BufferAddress;
import com.bytezone.dm3270.orders.BufferAddressSource;
import com.bytezone.dm3270.orders.Order;
import com.bytezone.dm3270.orders.SetBufferAddressOrder;
import com.bytezone.dm3270.orders.TextOrder;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Optional;
public class AIDCommand extends Command implements BufferAddressSource, Iterable {
public static final byte NO_AID_SPECIFIED = 0x60;
public static final byte AID_STRUCTURED_FIELD = (byte) 0x88;
public static final byte AID_PA3 = 0x6B;
public static final byte AID_PA1 = 0x6C;
public static final byte AID_CLEAR = 0x6D;
public static final byte AID_PA2 = 0x6E;
public static final byte AID_ENTER = 0x7D;
public static final byte AID_PF1 = (byte) 0xF1;
public static final byte AID_PF2 = (byte) 0xF2;
public static final byte AID_PF3 = (byte) 0xF3;
public static final byte AID_PF4 = (byte) 0xF4;
public static final byte AID_PF5 = (byte) 0xF5;
public static final byte AID_PF6 = (byte) 0xF6;
public static final byte AID_PF7 = (byte) 0xF7;
public static final byte AID_PF8 = (byte) 0xF8;
public static final byte AID_PF9 = (byte) 0xF9;
public static final byte AID_PF10 = (byte) 0x7A;
public static final byte AID_PF11 = (byte) 0x7B;
public static final byte AID_PF12 = (byte) 0x7C;
public static final byte AID_PF13 = (byte) 0xC1;
public static final byte AID_PF14 = (byte) 0xC2;
public static final byte AID_PF15 = (byte) 0xC3;
public static final byte AID_PF16 = (byte) 0xC4;
public static final byte AID_PF17 = (byte) 0xC5;
public static final byte AID_PF18 = (byte) 0xC6;
public static final byte AID_PF19 = (byte) 0xC7;
public static final byte AID_PF20 = (byte) 0xC8;
public static final byte AID_PF21 = (byte) 0xC9;
public static final byte AID_PF22 = (byte) 0x4A;
public static final byte AID_PF23 = (byte) 0x4B;
public static final byte AID_PF24 = (byte) 0x4C;
public static final byte AID_SYSREQ = (byte) 0xF0;
private static final byte AID_READ_PARTITION = 0x61;
private static final byte AID_CLEAR_PARTITION = 0x6A;
private static byte[] keys =
{0, NO_AID_SPECIFIED, AID_ENTER, AID_PF1, AID_PF2, AID_PF3, AID_PF4, AID_PF5,
AID_PF6, AID_PF7, AID_PF8, AID_PF9, AID_PF10, AID_PF11, AID_PF12, AID_PF13,
AID_PF14, AID_PF15, AID_PF16, AID_PF17, AID_PF18, AID_PF19, AID_PF20, AID_PF21,
AID_PF22, AID_PF23, AID_PF24, AID_PA1, AID_PA2, AID_PA3, AID_CLEAR,
AID_CLEAR_PARTITION, AID_READ_PARTITION, AID_SYSREQ};
private static String[] keyNames =
{"Not found", "No AID", "ENTR", "PF1", "PF2", "PF3", "PF4", "PF5", "PF6", "PF7",
"PF8", "PF9", "PF10", "PF11", "PF12", "PF13", "PF14", "PF15", "PF16", "PF17",
"PF18", "PF19", "PF20", "PF21", "PF22", "PF23", "PF24", "PA1", "PA2", "PA3",
"CLR", "CLR Partition", "Read Partition", "System Request"};
private int key;
private byte keyCommand;
private BufferAddress cursorAddress;
private final List modifiedFields = new ArrayList<>();
private final List orders = new ArrayList<>();
private final List textOrders = new ArrayList<>();
public AIDCommand(byte[] buffer, int offset, int length) {
super(buffer, offset, length); // copies buffer[offset:length] to data[]
keyCommand = data[0];
key = findKey(keyCommand);
if (length <= 1) {
cursorAddress = null;
return;
}
cursorAddress = new BufferAddress(data[1], data[2]);
int ptr = 3;
Order previousOrder = null;
ModifiedField currentAIDField = null;
while (ptr < length) {
Order order = Order.getOrder(data, ptr, length);
if (previousOrder != null && previousOrder.matchesPreviousOrder(order)) {
previousOrder.incrementDuplicates();
} else {
orders.add(order);
previousOrder = order;
}
if (order instanceof SetBufferAddressOrder) {
currentAIDField = new ModifiedField((SetBufferAddressOrder) order);
modifiedFields.add(currentAIDField);
} else if (currentAIDField != null) {
currentAIDField.addOrder(order);
}
if (order instanceof TextOrder) {
textOrders.add(order);
}
ptr += order.size();
}
}
private int findKey(byte keyCommand) {
// starts at offset 1
for (int i = 1; i < keys.length; i++) {
if (keys[i] == keyCommand) {
return i;
}
}
return 0;
}
// copy modified fields back to the screen - only used in Replay mode
// Normally an AID is a reply command (which never has process() called)
// Testing out whether the plugin reply should pass through here.
@Override
public void process(Screen screen) {
if (!prettyMoveHandled(screen)) {
FieldManager fieldManager = screen.getFieldManager();
for (ModifiedField aidField : modifiedFields) {
Optional optField = fieldManager.getFieldAt(aidField.getLocation());
if (!optField.isPresent()) {
continue; // in replay mode we cannot rely on the fields list
}
Field field = optField.get();
if (aidField.hasData()) {
field.setText(aidField.getBuffer());
} else {
field.erase();
}
}
}
// place cursor in new location
if (cursorAddress != null) {
screen.getScreenCursor().moveTo(cursorAddress.getLocation());
}
screen.lockKeyboard(keyNames[key]);
}
// test to see whether this is data entry that was null suppressed into moving
// elsewhere on the screen (like the TSO logoff command) - purely aesthetic
private boolean prettyMoveHandled(Screen screen) {
if (modifiedFields.size() == 1) {
Cursor cursor = screen.getScreenCursor();
Field currentField = cursor.getCurrentField();
if (currentField != null) {
int cursorOldLocation = cursor.getLocation();
if (cursorOldLocation != currentField.getFirstLocation()
&& currentField.contains(cursorOldLocation)) {
int cursorDistance = cursorAddress.getLocation() - cursorOldLocation;
byte[] buffer = modifiedFields.get(0).getBuffer();
if (buffer.length == cursorDistance) {
// cannot call field.setText() as the data starts mid-field
for (byte b : buffer) {
cursor.typeChar(b); // send characters through the old cursor
}
return true;
}
}
}
}
return false;
}
@Override
public BufferAddress getBufferAddress() {
return cursorAddress;
}
@Override
public String getName() {
return "AID : " + keyNames[key];
}
@Override
public String toString() {
StringBuilder text = new StringBuilder();
text.append(String.format("AID : %-12s : %02X%n", keyNames[key], keyCommand));
if (cursorAddress != null) {
text.append(String.format("Cursor : %s%n", cursorAddress));
}
if (modifiedFields.size() > 0) {
text.append(String.format("%nModified fields : %d", modifiedFields.size()));
for (ModifiedField aidField : modifiedFields) {
text.append("\nField : ");
text.append(aidField);
}
// response to a read buffer request
} else if (orders.size() > 0) {
text.append(String.format("%nOrders : %d%n",
orders.size() - textOrders.size()));
text.append(String.format("Text : %d%n", textOrders.size()));
// if the list begins with a TextOrder then tab out the missing columns
if (orders.size() > 0 && orders.get(0) instanceof TextOrder) {
text.append(String.format("%40s", ""));
}
for (Order order : orders) {
String fmt = (order instanceof TextOrder) ? "%s" : "%n%-40s";
text.append(String.format(fmt, order));
}
}
return text.toString();
}
// This class is used to collect information about each modified field specified
// in the AIDCommand.
private class ModifiedField {
private SetBufferAddressOrder sbaOrder;
private List orders = new ArrayList<>();
private ModifiedField(SetBufferAddressOrder sbaOrder) {
this.sbaOrder = sbaOrder;
}
private void addOrder(Order order) {
orders.add(order);
}
private int getLocation() {
return sbaOrder.getBufferAddress().getLocation();
}
private boolean hasData() {
return getBuffer().length > 0;
}
public byte[] getBuffer() {
for (Order order : orders) {
if (order instanceof TextOrder) {
return order.getBuffer(); // assumes only one
}
}
return new byte[0];
}
@Override
public String toString() {
StringBuilder text = new StringBuilder();
text.append(String.format("%-40s", sbaOrder));
for (Order order : orders) {
if (!(order instanceof TextOrder)) {
text.append(String.format("\n : %-40s", order));
} else {
text.append(order);
}
}
return text.toString();
}
}
@Override
public Iterator iterator() {
return orders.iterator();
}
}